Western nations do not necessarily fear a specific India-Canada row, but they do pay close attention to international disputes and conflicts, especially when they involve countries with significant global influence. To elaborate on why Western nations might be concerned about such a situation, it's important to consider various factors, including geopolitics, trade, and diplomacy.

Geopolitical Significance : 

India and Canada are both important players on the global stage due to their size, economic strength, and strategic locations. India is the world's second-most populous country, and Canada is one of the largest nations by landmass. Both countries possess considerable political influence in their respective regions.

Western nations, particularly the United States and European countries, have long-standing political and economic ties with both India and Canada. They recognize the importance of maintaining stability and peaceful relations among influential nations to ensure global security and prosperity. Any escalation in tensions between India and Canada could disrupt this delicate balance.

Trade Relations : 

Trade is a crucial aspect of international relations, and India and Canada are both major players in global trade. Western nations, including the United States and members of the European Union, have extensive economic ties with these countries.

For example, Canada is a significant supplier of natural resources, including oil, minerals, and lumber, to Western economies. An India-Canada dispute could potentially disrupt the flow of these vital resources, impacting Western economies and their energy security.

India, on the other hand, represents a massive consumer market for Western goods and services. Many Western multinational corporations have invested heavily in India, making it a critical destination for trade and investment. A conflict between India and Canada could disrupt this economic relationship, leading to financial instability in Western nations.

Diplomatic Relations : 

Western nations also engage with India and Canada on various diplomatic fronts, including discussions on climate change, security cooperation, and regional stability. Both India and Canada are active members of international organizations such as the United Nations, the G20, and the Commonwealth.

A dispute between these two nations could potentially strain Western nations' diplomatic efforts to address global challenges effectively. Cooperation on issues like climate change, terrorism, and peacekeeping missions might become more challenging if India and Canada are at odds.

Balance of Power : 

Western nations often seek to maintain a balance of power in international relations to prevent any one nation from becoming too dominant. They do this by fostering alliances and partnerships with various countries. India has been seen as a counterbalance to China's rising influence in Asia, and Canada plays a role in North American security and trade relations.

A conflict or deteriorating relations between India and Canada could shift the balance of power in unpredictable ways, which might not align with Western nations' strategic interests.

In conclusion, Western nations don't necessarily fear an India-Canada row in and of itself, but they are concerned about the potential consequences such a dispute could have on global geopolitics, trade, diplomacy, and the balance of power. These concerns stem from the interconnectedness of the modern world, where conflicts between influential nations can have far-reaching and often adverse effects on the global economy, security, and stability. Therefore, Western nations strive to prevent and mitigate conflicts that involve countries with significant international influence.